Granted Patent
Utility
US 3,933,970 · App. 05/307,939
Shaped press-forged normally frangible inorganic crystals
Inventors:
King H. Rosette, Herbert Packer
Patented Case
View Patent ↗
Granted: Jan 20, 1976
Filed: Nov 20, 1972
Inventors
King H. Rosette
Herbert Packer
Assignee (at issue)
The Harshaw Chemical Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.